Announcement PDF 21 May 2026 ASX RELEASE COMPLETION OF MARSS ACQUISITION Electro Optic Systems Holdings Limited (“EOS” or the “Company”) (ASX:EOS), is pleased to advise that the acquisition of the MARSS business (“MARSS”) is now complete. This follows the announcement on 15 May 2026 (“MARSS Business and Transaction Update”). EOS CEO and Managing Director, Dr. Andreas Schwer said “We are pleased to have completed the MARSS acquisition – this is a significant addition to EOS’ capability. In recent months, the MARSS NiDAR platform has been protecting critical assets in the Middle East from drone attacks. We welcome the MARSS team to EOS and look forward to working together to secure and execute the commercial opportunities that lie ahead.” MARSS CEO, Johannes Pinl, said “We are very proud of the MARSS team and the success of the NiDAR Counter-Drone Command and Control platform. With systems and personnel supporting operations across the Middle East, MARSS remains committed to protecting critical sites and advancing our capabilities. We are pleased to become part of EOS and look forward to growing our business together.” This announcement has been authorised for release by the Board of Directors. DR. ANDREAS SCHWER Managing Director and Chief Executive Officer ir@eos-aus.com Page 2 of 2 ABOUT ELECTRO OPTIC SYSTEMS (ASX: EOS) Following the acquisition of MARSS, EOS operates in two divisions DEFENCE SYSTEMS Defence Systems specialises in technology for weapon systems optimisation and integration, as well as ISR (Intelligence, Surveillance and Reconnaissance) and C4 systems for land warfare. Its key products include next-generation remote weapon systems, vehicle turrets, high-energy laser weapons (directed energy), as well as fully integrated and modular counter-UAS and C2 and C4 systems. C2 Systems include Command and Control Systems such as MARSS’ software-led counter-drone and critical infrastructure protection capabilities, centred on the NiDAR platform. SPACE SYSTEMS Space Systems specialises in applying EOS-developed optical sensors and effectors to detect, track and characterise objects in space. It includes capabilities in the domain of space control. FORWARD LOOKING STATEMENTS This announcement may contain certain "forward-looking statements" including statements regarding EOS' intent, belief or current expectations with respect to EOS' business and operations, market conditions, results of operations, financial condition, and risk management practices. The words "likely", "expect", "aim", "should", "could", "may", "anticipate", "predict", "believe", "plan" and other similar expressions are intended to identify forward-looking statements. Indications of, and guidance on, future earnings, financial position and performance, establishment costs and capital requirements are also forward-looking statements. Forward-looking statements including projections, guidance on future earnings and estimates are provided as a general guide only and should not be relied upon as an indication or guarantee of future performance. This announcement may contain such statements that are subject to risk factors associated with an investment in EOS. Forward- looking statements involve known and unknown risks, uncertainties and assumptions and other important factors that could cause the actual results, performances or achievements of EOS to be materially different from future results, performances or achievements expressed or implied by such statements. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this announcement